Enabled strict mode in tsconfig.json

.prettierrc.json

@@ -0,0 +1,5 @@
+{
+    "tabWidth": 4,
+    "singleQuote": true,
+    "semi": true
+}

README.md

@@ -1,6 +1,7 @@
 # poker-odds-machine
+
 > Uses Monte Carlo simulation to estimate win probability of any poker hand.  
-Check it out in action at https://emileindik.com/projects/poker.html (Heroku will probably be sleepy and need to wake up, so give it a minute)
+> Check it out in action at https://emileindik.com/projects/poker.html (Heroku will probably be sleepy and need to wake up, so give it a minute)
 
 ## Install
 
@@ -17,7 +18,7 @@ const input = {
      * Hands of players, following the syntax below.
      * A player can have a partial hand (one card specified) in order
      * to have their next card randomly selected.
-     * If hands option not supplied, then numPlayers must be provided. 
+     * If hands option not supplied, then numPlayers must be provided.
      */
     hands: ['Ac,Kc', '2h,7d', 'Js'],
     /**
@@ -54,12 +55,12 @@ const input = {
      */
     returnTieHandStats: true,
     /**
-     * Number of iterations in the Monte Carlo simluation to perform.
+     * Number of iterations in the Monte Carlo simulation to perform.
      * The more iterations, the more accurate the returned probabilities,
      * but the longer the calculation takes.
      * Defaults to 1000.
      */
-    iterations: 1000000
+    iterations: 1000000,
 };
 
 const c = new Calculator(input);
@@ -185,6 +186,7 @@ console.log(s);
   }
 }
 ```
+
 </details>
 
 Disclaimer:  
@@ -210,4 +212,5 @@ npm test
 │    8    │ 'straightFlush' │ 0.031083  │   0.0308    │ -0.9105 │
 └─────────┴─────────────────┴───────────┴─────────────┴─────────┘
 ```
+
 The test calculates estimated probability for all hands and compares them against their true hypothetical value (% hypo).

index.test.ts

@@ -0,0 +1,17 @@
+import { describe, it, expect } from '@jest/globals';
+import { Calculator, Input } from '.';
+
+describe('Calculator', () => {
+    it('should show player 1 beating player 2 by at least 70%', () => {
+        const firstHand = 'Ac,Ad';
+        const secondHand = '7c,2d';
+        const input: Input = {
+            hands: [firstHand, secondHand],
+            numPlayers: 2,
+            iterations: 10000,
+        };
+        const calculator = new Calculator(input);
+        const results = calculator.simulate();
+        expect(results[firstHand].winPercent).toBeGreaterThan(70);
+    });
+});

index.ts

@@ -1,2 +1,2 @@
 export { Calculator } from './src/Game';
-export { Input } from './src/types';
+export { Input } from './src/types';

jest.config.ts

@@ -0,0 +1,7 @@
+import { Config } from '@jest/types';
+
+const config: Config.InitialOptions = {
+    preset: 'ts-jest',
+    testEnvironment: 'node',
+};
+export default config;